Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bb42e76b7a8c74c…

MALICIOUS

PDF

51.0 KB Authoring application: Pdftk
MD5: be3ffd30099d34db936bc64d9bd93d7e SHA-1: 10a3e1fa0f7f028e23027a265e2296825605e196 SHA-256: 2bb42e76b7a8c74c40025ee1fe434ac2a8bf83f19b43a79348034c2233ce1902
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, to various domains. This is strongly indicative of a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier further support its malicious nature, classifying it as phishing or a traffic redirection mechanism. The embedded URLs are the primary IOCs, suggesting the document's purpose is to drive traffic to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://neugewonnenerottweilers.ca/uploads/1/3/0/5/130551211/2763230.pdf
    • http://richmondvideoservices.com/uploads/1/3/0/2/130288893/wagisobus_xafopumavuneli.pdf
    • http://integratedeyecarecollaborative.org/uploads/1/3/0/2/130272478/7ff949e06ea2.pdf
    • http://bosplumbing.com/uploads/1/3/0/5/130540869/zuziri-famidixopumi-nolesuxu-fesujipal.pdf
    • http://caminodesantidadsf.com/uploads/1/3/0/6/130639678/jeset.pdf
    • http://alohastudionh.com/uploads/1/3/0/4/130492038/suzonef_xurinuj_bazefu_busigujon.pdf
    • http://mstvirginhair.com/uploads/1/3/0/5/130539981/dusotuwatopabeti.pdf
    • http://lowefinancialservices.com/uploads/1/3/0/5/130539612/vokus.pdf
    • http://nancywijnants.com/uploads/1/3/0/6/130621818/tefesasogo.pdf
    • http://mikeintucson.com/uploads/1/3/0/4/130476078/130476078.html#my+google+play+store+always++pending

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000012d4.bin
e67e2be99de6a3446de5cf52b371ba0229ba8c8919507fb95959e32d67daa8b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D4 9472 bytes
font_01_sfnt_off00008d51.bin
04414b26e0b4ca8ff43c66c3031bc0ee8974c5575620ee5932204091fddcd077		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D51 2604 bytes

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